Question

EXERCISE 6 (A)
Factorise the following polynomials :
1. 3x - 12
2. 80 + 16y
3. 8x - 8y
4. 7x + 14
5. a? + 7a
6. 5y - 7y2
7.86² – 24c 8. 5m2 - 6m
9. 12u - 20uy 10. 10p9 -12 p?q
11. 24d +32d 12. 30g +54gh 13. 28c%d? -21c²d 14. 36yºz +48y?z? 15. 6p+8p2 - 4 p)
16. 12a -15a? - 7a 17. 15yz3 – 20 yºz4 +35y?z?
18. 14mºn^ p² - 42m’n’p? – 70mºn4 p3​

Answer 1

Answer:

1 . -6

Step-by-step explanation:

by giving x =2

then 3 ×2-12=-6

Answer 2

1. 3x - 12

3*x - 3*4

3(x-4)

2. 80+16y

8*10+8*2*y

8(10+2y)

3. 8x-8y

8*x-8*y

8(x-y)

4. 7x+14

7*x+7*2

7(x+2)

5.a^2+7a

a*a+7*a

a(7+a)

6.5y-7y^2

5*y-7*y*y

y(5-7y)

7. 8c^2-24c

4*2*c*c-2*12*c

2c(4c-12)

8. 5m^2 - 6m

5*m*m-6*m  

m(5m-6)

9. 12u - 20uy

2*6*u-2*10*u*y

2u(6-10y)

10. 10pq -12 p^2q

2*5*p*q-2*6*p*p*q

2pq(5-6p)

11. 24d +32d^3

2*12*d+2*16*d*d*d

2d(12+16d^2)

12.30g +54gh

2*15*g+2*27*g*h

2g(15+27h)

13.28c^2d^2-21c^2d

7*4*c*c*d*d-7*3*c*c*d

7c^2d(4d-3)

14.36y^3z+48y^2z^2

2*18*y*y*y*z+2*24*y*y*z*z

2y^2z(3y+4z)

15.6p+8p^2-4p^2

2*3*p+8*p*p-2*2*p*p

2p^2(3p+8-2)

16.12a^3-15a^2-7a

12*a*a*a-15*a*a-7*a

a(12a^2-15a-7)

17.15y^2z^2-20y^3z^4+35y^2z^2

5*3*y*y*z*z-5*4*y*y*y*z*z*z*z+5*7*y*y*z*z

5y^2z^2(3z-4yz^2+1)

18. 14m^5n^4p^2-42m^7n^3p^3-70m^6n^4p^3

14m^5n^3p^2(n-3m^2p^5-5mnp)

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